Question 1

Which of the following statements best describes the role of functional groups in drug molecules?

Accepted Answer

Functional groups determine the predictable physical and chemical properties of a drug, influencing its pharmacokinetics, mechanism of action, and side effects.

Question 2

Which of the following alcohols is most likely to be a solid at room temperature?

Accepted Answer

1-Dodecanol ($$C_{12}$$ alcohol)

Question 3

Which reaction sequence correctly describes the oxidation of a primary alcohol?

Accepted Answer

$$1^\circ$$ alcohol $$\rightarrow$$ aldehyde $$\rightarrow$$ carboxylic acid

Question 4

Phenols are more acidic than aliphatic alcohols primarily because:

Accepted Answer

The benzene ring withdraws electrons, stabilizing the phenoxide ion.

Question 5

Which of the following is a common pharmaceutical use of halogenated phenols?

Accepted Answer

As antiseptics due to their antibacterial properties

Question 6

Which property distinguishes ethers from alcohols in terms of water solubility and chemical reactivity?

Accepted Answer

Ethers are generally less water-soluble and more inert than alcohols.

Question 7

Which reaction is used to identify the presence of aldehydes and ketones in a compound?

Accepted Answer

Reaction with 2,4-dinitrophenylhydrazine (DNP) to form an orange precipitate

Question 8

Which of the following statements about carboxylic acids is correct?

Accepted Answer

Carboxylic acids can undergo nucleophilic substitution reactions to form esters and amides.

Question 9

The prodrug concept is best illustrated by which of the following statements?

Accepted Answer

A drug is temporarily converted into an inactive, labile compound to improve absorption, then reactivated in vivo.

Question 10

Which of the following best explains why oseltamivir is administered as an ester prodrug rather than as its carboxylate form?

Accepted Answer

The ester form is less polar and neutral, improving absorption and pharmacokinetics.

Question 11

Which of the following is a correct classification for the amine group in the structure $$R_1NHR_2$$?

Accepted Answer

Secondary amine

Question 12

Which of the following statements about the basicity of amines is correct?

Accepted Answer

Basic strength increases from primary to tertiary amines.

Question 13

Which of the following is a typical reaction of a carboxylic acid with an alcohol?

Accepted Answer

Formation of an ester

Question 14

Which property is responsible for the higher boiling points of alcohols compared to alkanes of similar molecular weight?

Accepted Answer

Presence of strong hydrogen bonding between alcohol molecules

Question 15

Which of the following is a pharmaceutical application of quaternary ammonium salts?

Accepted Answer

Used as cationic surfactants and antibacterial agents

Question 16

Which of the following best describes the chemical property of ethers that makes them hazardous upon prolonged storage?

Accepted Answer

They can form explosive peroxides when exposed to light and oxygen.

Question 17

Which of the following is a correct statement about the water solubility of amines?

Accepted Answer

Amines with up to 6 carbon atoms are generally water-soluble due to hydrogen bonding.

Question 18

Which of the following is a real-life example of the use of the prodrug concept to improve drug absorption?

Accepted Answer

Conversion of oseltamivir carboxylate to oseltamivir ester for oral administration

Functional Groups in Organic and Medicinal Chemistry: Properties, Reactions, and Pharmaceutical Relevance

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